All Regions Europe BBC Weather forecasts when rain will return to London after 25C 10-day heatwave Nothing lasts forever, least of all sunshine in the UK My London – WeatherRead More About Author OTW Observer See author's posts Continue Reading Previous: BBC weather experts forecast exactly when 10 day London heatwave reaching 25C will hitNext: When is hay fever season and why you may be affected at different times Related Stories 26C weather to mark ‘last blast of summer’ in London before rain sweeps in All Regions Europe 26C weather to mark ‘last blast of summer’ in London before rain sweeps in September 19, 2025 Exactly when London temperatures soar to 26C before dropping 10 degrees All Regions Europe Exactly when London temperatures soar to 26C before dropping 10 degrees September 17, 2025 Weather expert gives verdict on chances of thunderstorms in London next week All Regions Europe Weather expert gives verdict on chances of thunderstorms in London next week September 16, 2025